push-pull propeller stirrer

... push-pull photocell 推挽式光电管 push-pull propeller stirrer 推挽式螺旋桨搅拌器 push-pull quintupler 推挽式五倍频器 ...

propell... ... propeller windmill 螺桨式风车 push-pull propeller stirrer 推挽式螺桨搅拌器 rear propeller shaft 后螺旋桨轴 ...